The Grey Copper occurrence consists of a quartz vein hosted by Helikian Aldridge Formation (Purcell Supergroup) quartzites. The vein is directly beneath a diorite sill on the north side of Lone Pine Hill. The vein is less than 0.5 metres wide, strikes 045 degrees and dips about 45 degrees southeast into the hill. The showing is exposed by 15 metre incline shaft. Sulphides (tetrahedrite) occur as streaks and pods within the vein. Good assays from hand-cobbed ore were reported.